core: Derive Default for Wrapping<T> #28892
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It's not very common to store `Wrapping` values, but I kept wrapping and unwrapping a hash value when I taking it out of a struct to do operations on it. I couldn't store the hash as `Wrapping<u64>` because I wanted to be able to `#[derive(Default)]` for the struct. At any rate, it feels to me that `Wrapping<T>` should implement pretty much everything `T` does. I left out `#[derive(Hash)]` since I'd be hard pressed to find a use case and wanted to avoid the extra generated code, but maybe I should add that too?
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It's not very common to store
Wrappingvalues, but I kept wrapping and unwrapping a hash value when I taking it out of a struct to do operations on it. I couldn't store the hash asWrapping<u64>because I wanted to be able to#[derive(Default)]for the struct.At any rate, it feels to me that
Wrapping<T>should implement pretty much everythingTdoes. I left out#[derive(Hash)]since I'd be hard pressed to find a use case and wanted to avoid the extra generated code, but maybe I should add that too?